Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc-Si system

Aning Qin; Dandan Liu; Chong Chen; Shuhong Liu; Yong Du; Man Wang; Philip Nash

doi:10.1007/s10973-014-4216-2

Heat contents of Sc₅Si₃ and ScSi intermetallics and thermodynamic modeling of the Sc-Si system

Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu^*, Yong Du, Man Wang, Philip Nash

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

12 Citations (Scopus)

Abstract

The heat contents (H_T − H_298K) of Sc₅Si₃ and ScSi in the Sc–Si system were measured by drop calorimetry method from 400 to 1,200 °C in the present work. Based on the critically reviewed thermodynamic properties and phase diagram data from the literature and the present work, the Sc–Si system was assessed by means of the CALPHAD (CALculation of PHAse Diagram) approach. The Gibbs energies of solution phases, Liquid, (αSc), (βSc), and (Si), were modeled by the Redlich–Kister polynomial. All the intermetallic compounds, Sc₅Si₃, ScSi, αSc₃Si₅, and βSc₃Si₅, were described as stoichiometric phases. Finally, a set of self-consistent thermodynamic parameters for the Sc–Si system was obtained. The calculated phase diagram and thermodynamic properties agree well with the available experimental data.

Original language	English
Pages (from-to)	1315-1321
Journal	Journal of Thermal Analysis and Calorimetry
Volume	119
Issue number	2
Online published	19 Oct 2014
DOIs	https://doi.org/10.1007/s10973-014-4216-2
Publication status	Published - Feb 2015

Funding

The financial support from the National Science Foundation for Youth of China (Grant No. 51101172), basic Research Program of China (Grant No. 2011CB610401), and Sino-German Center for Promotion of Science (Grant No. GZ-755) is greatly acknowledged.

Research Keywords

Sc-Si
Calorimetry
Heat content
CALPHAD
Phase diagram
PHASE-EQUILIBRIA
SCANDIUM
ENTHALPIES
SILICIDES
ALLOYS

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10.1007/s10973-014-4216-2

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Cite this

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title = "Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc-Si system",

abstract = "The heat contents (HT − H298K) of Sc5Si3 and ScSi in the Sc–Si system were measured by drop calorimetry method from 400 to 1,200 °C in the present work. Based on the critically reviewed thermodynamic properties and phase diagram data from the literature and the present work, the Sc–Si system was assessed by means of the CALPHAD (CALculation of PHAse Diagram) approach. The Gibbs energies of solution phases, Liquid, (αSc), (βSc), and (Si), were modeled by the Redlich–Kister polynomial. All the intermetallic compounds, Sc5Si3, ScSi, αSc3Si5, and βSc3Si5, were described as stoichiometric phases. Finally, a set of self-consistent thermodynamic parameters for the Sc–Si system was obtained. The calculated phase diagram and thermodynamic properties agree well with the available experimental data.",

keywords = "Sc-Si, Calorimetry, Heat content, CALPHAD, Phase diagram, PHASE-EQUILIBRIA, SCANDIUM, ENTHALPIES, SILICIDES, ALLOYS",

author = "Aning Qin and Dandan Liu and Chong Chen and Shuhong Liu and Yong Du and Man Wang and Philip Nash",

year = "2015",

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T1 - Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc-Si system

AU - Qin, Aning

AU - Liu, Dandan

AU - Chen, Chong

AU - Liu, Shuhong

AU - Du, Yong

AU - Wang, Man

AU - Nash, Philip

PY - 2015/2

Y1 - 2015/2

N2 - The heat contents (HT − H298K) of Sc5Si3 and ScSi in the Sc–Si system were measured by drop calorimetry method from 400 to 1,200 °C in the present work. Based on the critically reviewed thermodynamic properties and phase diagram data from the literature and the present work, the Sc–Si system was assessed by means of the CALPHAD (CALculation of PHAse Diagram) approach. The Gibbs energies of solution phases, Liquid, (αSc), (βSc), and (Si), were modeled by the Redlich–Kister polynomial. All the intermetallic compounds, Sc5Si3, ScSi, αSc3Si5, and βSc3Si5, were described as stoichiometric phases. Finally, a set of self-consistent thermodynamic parameters for the Sc–Si system was obtained. The calculated phase diagram and thermodynamic properties agree well with the available experimental data.

AB - The heat contents (HT − H298K) of Sc5Si3 and ScSi in the Sc–Si system were measured by drop calorimetry method from 400 to 1,200 °C in the present work. Based on the critically reviewed thermodynamic properties and phase diagram data from the literature and the present work, the Sc–Si system was assessed by means of the CALPHAD (CALculation of PHAse Diagram) approach. The Gibbs energies of solution phases, Liquid, (αSc), (βSc), and (Si), were modeled by the Redlich–Kister polynomial. All the intermetallic compounds, Sc5Si3, ScSi, αSc3Si5, and βSc3Si5, were described as stoichiometric phases. Finally, a set of self-consistent thermodynamic parameters for the Sc–Si system was obtained. The calculated phase diagram and thermodynamic properties agree well with the available experimental data.

KW - Sc-Si

KW - Calorimetry

KW - Heat content

KW - CALPHAD

KW - Phase diagram

KW - PHASE-EQUILIBRIA

KW - SCANDIUM

KW - ENTHALPIES

KW - SILICIDES

KW - ALLOYS

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U2 - 10.1007/s10973-014-4216-2

DO - 10.1007/s10973-014-4216-2

M3 - RGC 21 - Publication in refereed journal

SN - 1388-6150

VL - 119

SP - 1315

EP - 1321

JO - Journal of Thermal Analysis and Calorimetry

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